Since publication of the first edition, satellite communications systems have become increasingly sophisticated.  This revised and updated fifth edition covers the entire field of satellite communications engineering from the techniques of orbital mechanics and radio wave propagation to the design of communication links and earth stations.  The new edition will reflect recent developments in technologies and standards, with greater emphasis on techniques allowing service provision of multimedia contents, and material on recent standards in broadcasting such as DVB-RCS and DVB-S2.  The authors also discuss mobile satellite channels in view of expected development of broadcasting by satellites to mobile (portable) terminals, and include updates on onboard processing.  A new chapter will be dedicated to examples of existing systems.